Seat Assignment - Seat map displayed, but cannot select

The seat map has opened up for our flight on 22nd Feb 2014 from MAN - MCO (VS75).

It shows seats available to choose from in PE on both the upper and main deck, but it doesn't seem to matter which seats I choose, whenever I select 'submit' I get the message

'We're sorry, the seat(s) you have chosen are not available. You are still shown in your original seat(s)'

But we don't have any 'original seats' assigned. Any ideas/suggestions?

are you still at 90 days + a few hours? try again later, after 8am

are you still at 90 days + a few hours? try again later, after 8am

Thanks for the suggestion, I'll try again later. Just want to get PE seats on the main deck as I hear it can depend on the crew whether PE on the upper deck is allowed to disembark before main deck economy. So we'd like to be towards the front of the queue at MCO immigration not at the back after the main deck has disembarked!

I have managed to select seats just after 8am on the 90 days, so you could try now

I have managed to select seats just after 8am on the 90 days, so you could try now

Many thanks, just snagged 16A & C. Noticed 17A & C and 18C gone by the time I logged back in. Just need to wait until next Sunday now for the return leg.